:root {
  --primary: #0a2540;
  --secondary: #153e6e;
  --bg: #f4f6fb;
  --text: #1a1a1a;
  --card: #ffffff;
  --border: #dfe7f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.hidden {
  display: none !important;
}

.mt-24 {
  margin-top: 24px;
}

/* LOGIN */
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background: linear-gradient(135deg, #0a2540, #153e6e);
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: white;
  border-radius: 18px;
  padding: 30px;
  box-shadow: 0 20px 60px rgba(0,0,0,.18);
}

.login-card h1 {
  margin: 0 0 10px;
  color: var(--primary);
}

.login-card p {
  margin: 0 0 20px;
  color: #555;
}

.login-form {
  display: grid;
  gap: 12px;
}

.login-form input,
.login-form button {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  font-size: 15px;
}

.login-form input {
  border: 1px solid #ccd7e2;
}

.login-form button {
  border: none;
  background: var(--primary);
  color: white;
  cursor: pointer;
  font-weight: bold;
}

.error-text {
  color: #b42318;
  margin-top: 12px;
  min-height: 20px;
}

/* VIP */
.vip-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.vip-sidebar {
  background: var(--primary);
  color: white;
  padding: 24px;
}

.vip-sidebar h2 {
  margin-top: 0;
}

.vip-menu {
  display: grid;
  gap: 10px;
  margin: 24px 0;
}

.vip-menu a {
  color: white;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(255,255,255,.08);
}

.logout-btn {
  width: 100%;
  border: none;
  padding: 12px;
  border-radius: 10px;
  background: white;
  color: var(--primary);
  cursor: pointer;
  font-weight: bold;
}

.vip-main {
  padding: 24px;
}

.vip-hero {
  background: white;
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(0,0,0,.06);
  margin-bottom: 24px;
}

.vip-hero h1 {
  margin: 0 0 8px;
  color: var(--primary);
}

.vip-notice {
  margin-top: 12px;
  padding: 12px;
  border-left: 4px solid var(--primary);
  background: #edf4fb;
}

.vip-card {
  background: white;
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(0,0,0,.06);
  margin-bottom: 24px;
}

.chatbox {
  height: 360px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  background: #fafcff;
  margin-bottom: 14px;
}

.msg {
  max-width: 80%;
  margin-bottom: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  line-height: 1.45;
}

.msg.user {
  margin-left: auto;
  background: #dcecff;
}

.msg.bot {
  background: #eef2f6;
}

.msg.error {
  background: #fdecec;
  color: #b42318;
}

.chat-input-row {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 10px;
}

.chat-input-row input,
.chat-input-row button,
.admin-form input,
.admin-form button,
.content-item textarea,
.content-item button {
  padding: 12px;
  border-radius: 10px;
  font-size: 14px;
}

.chat-input-row input,
.admin-form input,
.content-item textarea {
  border: 1px solid var(--border);
}

.chat-input-row button,
.admin-form button,
.content-item button {
  border: none;
  background: var(--primary);
  color: white;
  cursor: pointer;
  font-weight: bold;
}

.content-list,
.user-list {
  display: grid;
  gap: 16px;
}

.content-item {
  display: grid;
  gap: 8px;
}

.content-item label {
  font-weight: bold;
  color: var(--primary);
}

.content-item textarea {
  min-height: 100px;
  resize: vertical;
}

.admin-form {
  display: grid;
  gap: 12px;
}

.checkbox-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.user-row {
  display: grid;
  grid-template-columns: 1.2fr 1.2fr .7fr .7fr;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fafcff;
}

@media (max-width: 900px) {
  .vip-layout {
    grid-template-columns: 1fr;
  }

  .chat-input-row {
    grid-template-columns: 1fr;
  }

  .user-row {
    grid-template-columns: 1fr;
  }
}